Electric switch.



A. H. NERO.

ELECTRIC SWITCH.

APPLICAUON HLED 0CT.28, 19-15. 1,234,069. Patented July 17,1917.

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flRY/a h. NERO ZZZbZCj'EF g m altar/142335 STATES PATE OFFICE;

COMRQNX. 0F HARTFORD, CONNECTICUT, A'COBBOBATION OF CONNECTICUT.

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ELECTRIC swrrcn.

Application filedOctober 28, 1915. Serial No. 58,472.

Y i/ I!!! 121710272 1'2 muy wmm le it' ylt-iiiawn that I. Anvil) ll.Xiaiio, a citizen o .tlie-l'nited States of America. and Lt- XewBritain. in the county of vented aH'certain-new and Improved Electric.Switch. of which the following is a specitication.

lily invention relates to electric switches and particulai'lyto aflushswitch ot' the push button type commonly employed to controllighting circuits. and the object of;

Fig. 3 is a detached perspective of the switch mechanism 11c! s0- and:

Fig. 1 is a vertical section through the mechanism showing the latter indifferent position from that shown in Fig. 2.

In the embodiment of my invention here illustrated. the present switchcomprises an insi'ilating body 10 ot cup-shape the bottom 13 of which ispierced to permit the operating buttons 11 and 12 to projecttherethrough. The carrying yoke 11 has loops 15 through which the pushbuttons pass and lScSQClll-Etl in position by long screws 16 which passupward tl'irougli the end walls of the body and taking into tapped holesin theyoke. while the heads of the screws overlie the metal closureplate 17 and hold the latter seated against the shoulder 18 in the lowerfat-es otthe body walls. The interior of the cup-shaped body thusaffords a closed switch chamber 19 into which project the switchterminals '20 and 21. the upper offset ends of which are tapped toreceive the securing screws 2; by means of which they are held inposition. Binding screws 23 and 21 are carried by theupper ends of theterminal plates and lie in wells and 26 opening to the; switch chamber19. but closed by the upper ends of the terminals so that dust and dirtare completely excluded from the chamber.

The switch frame comprises a pair of uprights 27 and 28 bent at rightangles to their 1.11- 1...... an m! 21 avtnnrlinir fill State ofConnecticut. have infrom the margins of the latter are tapped to receivethe securing screws 2!) by means Patented July 1 7; 1917.

of which the frame is rigidly secured to the inner face of the cupbutton 13. v Each'upright :27 and 28 is longitudinallyslotted at 3; and33 to receive .the margins of the plates 34 and ot' the push buttons 11and 12 respectively. in order to insure a recti-- linear motion of thebuttons in both directions on the actuation of the switch. ing lugs 36are struck outwardly from each of the uprights between the guideslots toform the axis of the oscillating switch lever 3?. the legs of which areperforated at 38.

to engage the lugs 3G. The uprights are also perforated in register at39'to form bearings for the short studs *0 carried'by the legs t1. 42,ot' the rocker bar-.43 which inassembled position lies between thestandards 27 and 28 of the switch frame. The

switch lever 37 androcker bar 13 thus form" a pair of yokes, the bridgebars of which l e on opposite sides of their respective axes ofoscillation.v An actuating spring 4% ex 'tends between these'bridge'barsand is secured thereto at its opposite ends by means of the tongues if)and it) struck. from the respective bridge bars. The switch blade or-ARVID H. unite. or new BRITAIN. CONNECTICUT, sssreno'n 'ro THE amiownnnermc blades :7 are secured in any suitable manner upon thesides ofthe switch lever 37. In

the present instance the switch is but ,a single pole device. andconsequently only a single switch blade 17 is mounted on the switchlever. I

In order to actuate the rocker bar 43, the leg 11, thereof which has theform of a. web. is slotted on opposite sides of its axis of oscillationat +8 and 4:9 to receive the extei'ideddugs 50 and-51 of the push buttonplates 3 and These lugs extend'through the slots 48 and i9 and enter theguide slots 32 and 33 in the web27 of the switch frame.

The opposite leg 42 of. the rocker bar 13, instead of being slotted, hasthe upper face,

of its web shaped to the contour oft-he slots '48 and 49 of the web 41and this surface is engaged by the shoulders 5% and'55 on the oppositemargins of the pusli'butto'n plates 1. In this wayan even pressure isexerted oneachside of the rocker bar, While, the push buttons aredetained in engagement with the rocker. by reason of the entry of thelugs 50 and 51 into the slots 48 and 49 of Web 41.

The operation of the switch is readily un-- 119 del'stood. Upon thedepression of button 11 from the position which it occupies in Fig.

2 to the position shown in Fig. 4; the rocker bar i3 is tilted on itsaxis. As the bridge bar of the rocker rises during this motion ittensions the spring 44 so that as soon as the upper end of the springhas passedthe axis of oscillation 36 of the switch bar 37,'it throws thelatter from its position of rest against the stop lugs 52 on one side ofthe frame against the stop lugs 53 on the opposite side of the frame.This results in the shifting of the switch blade 47 from its out ofcontact position in Fig. 2 to contact position, Fig. i, in which theblade spans the space between the switch terminals 20 and :21 and thuscloses the'circuit. The throw of the rocker" bar 43 is limited by itsimpingement against the bridge bar of the switch lever 37 and no otherstops are necessary for this purpose.

The construction shown is simple and the metal parts are readilymanufactured by stamping from sheet metal, while the shape of theporcelain is simple and requires no intricate die work. Variousmodifications and details of construction will readily occur to thoseskilled in the art without departing from what I claim as my inven tion.

I claim as my invention 1. In a push button switch, a switch framecarryinga pair of opposed plates having therein registering pairs ofguide slots, a pair of push buttons rectilinearly guided in said slots,a pivoted slotted rocker having a sliding actuating connection throughits slots with said buttons, a pivoted switch lever, said rocker bar andswitch lever having each a cross arm lying substantially parallel to theaxis of oscillation of each of said levers but on opposite sidesthereof, in combination with a switch spring extending between saidcross arms and serving to actuate the switch lever when the end of thespring secured to the rocker cross arm is moved past the axis ofoscillation of the switch lever by the actuation of the push buttons.

2. In a push button switch, a switch frame carrying a pair of opposedplates having therein registering pairs of guide slots. a pair of pushbuttons rectilinearly guided in said slots, a pivoted slotted rockervoke having a sliding actuating connecton through its slots with saidbuttons, :1 pivoted switch lever yoke, said rocker and switch yokeshaving their bridge pieces lying on opposite sides of the axis of theswitch lever, in combination with a switch spring extending between saidbridges and serving to actuate the switch lever when the end of thespring secured to the rocker yoke bridge is moved past the axis ofoscillation of the switch lever by the actuation of the push buttons.

3. In a push button switch, a switch frame carrying a pair of opposedplates having therein registering pairs of guide slots, :2. pair of pushbuttonsrectilinearly guided in said slots, a pivoted slotted rocker yokehavinga sliding actuating connection through its slots with saidbuttons, a pivoted switch lever yoke, said rocker and switch yokeshaving independent axes of oscillation and their bridge pieces lying onopposite sides respectively of said axes, in combination with a switchspring extending between said bridges and serving to actuate the switchlever when the end of the spring secured to the rocker yoke bridge ismoved past the axis of oscillation of the switch lever by the actuationof the push buttons. l. In a push button switch. a frame havmg a pair ofuprights, a rocker bar yoke, a switch lever yoke, both of said yokesbeing pivoted on the uprights of said frame. one between said uprightsand the other outside said uprights,-stops on the uprights limiting theextent of oscillation of one of said yokes, the other yoke havingmembers hearing against the bridge piece of said first yoke in the stopposition of the latter.

5. In a push button switch, a frame having a pair of uprights, a rockerbar yoke pivoted on and lying between said uprights, a switch lever yokepivoted on but outside said uprights, stops on the uprights engaging thebridge of the switch lever yoke to limit the extent of oscillation ofsaid switch lever and means on the rocker bar engaging the bridge of theswitch lever in stop position to limit the extent of oscillation of therocker bar.

6. In a push button switch. a frame having a pair of uprights, a rockerbar yoke pivoted on and lying between said uprights. a switch lever yokepivoted on but outside said uprights. stops on the uprights engaging,the bridge of the switch lever yoke to limit the extent of oscillationof said switch lever and webs on the rocker bar legs adapted to beengagedby the push buttons and extended to engage the bridge of theswitch lever in stop osition to limit the extent of oscillation o therocker bar.

In testimony whereof I have signed my name to this specification. in thepresence of two subscribing witnesses.

ARVID H. NERO. Witnesses.

FRED. P. GA'I'ER, C. A. TENEYCK.

